GEOTECH part 2

Question 1

NORMALLY CONSOLIDATED FINE-GRAINED SOIL

Accepted Answer

$\Delta H=H_0\;\frac{C_c}{1+e_0}\;log\left(\frac{\sigma_{vf}}{\sigma_{v0}}\right)$ $\Delta H=H_0\;\frac{C_c}{1+e_0}\;log(\Delta\sigma_v)

Question 2

OVER CONSOLIDATED FINE-GRAINED SOIL

Accepted Answer

$\sigma_{vmax}>\sigma_{vf}$ $\Delta H=H_0\frac{C_r}{1+e_0}log\left(\frac{\sigma_{vf}}{\sigma_{v0}}\right)$ $\Delta H=H_0\frac{C_r}{1+e_0}log\left(\Delta\sigma_v\right)$

Question 3

UNDER CONSOLIDATED FINE-GRAINED SOIL

Accepted Answer

$\sigma_{vmax}<\sigma_{vf}$ $\Delta H=\frac{H_0}{1+e_0}\left(C_rlog\left(\frac{\sigma_{vmax}}{\sigma_{v0}}\right)+C_clog\left(\frac{\sigma_{vf}}{\sigma_{vmax}}\right)\right)$

Question 4

VOLUME CHANGE IN SAND

Accepted Answer

$\Delta H=\frac{4qB^2}{k_v{(B+1)}^2}

Question 5

CONSISTENCY INDEX

Accepted Answer

$CI\ =\ \ \frac{LL\ -\ w}{PI}$

Question 6

CONSISTENCY INDEX

Accepted Answer

$CI\ =\ \ \frac{LL\ -\ w}{PI}$

Question 7

TOTAL or BULK SOIL PRESSURE

Accepted Answer

$P_t\ =\ \gamma_{sat}\ \left(h_1\right)+\ \gamma_{wet}\ \left(h_2\right)+\gamma_{zav}\ \left(h_3\right)+\ \gamma_{dry}\ \left(h_4\right)$

Question 8

EFFECTIVE or INTERGRANULAR SOIL PRESSURE

Accepted Answer

$P_{eff}\ =\ \left(\gamma_{sat}-\gamma_w\right)\ \left(h_1\right)+\ \gamma_{wet}\ \left(h_2\right)+\gamma_{zav}\ \left(h_3\right)+\ \gamma_{dry}\ \left(h_4\right)$

Question 9

PORE WATER PRESSURE

Accepted Answer

$P_{pw}\ =\gamma_w\ \left(h_w\right)$

Question 10

TOTAL or BULK SOIL PRESSURE

Accepted Answer

$P_t\ =\ \sum_{i\ =\ 0}^{h}{\left\{\begin{matrix}\gamma_{dry}\\begin{matrix}\gamma_{wet}\\begin{matrix}\gamma_{zav}\\gamma_{sat}\\end{matrix}\\end{matrix}\\end{matrix}ight\}\ h_i\ }$

Question 11

EFFECTIVE or INTERGRANULAR SOIL PRESSURE

Accepted Answer

$P_t\ =\ \sum_{i\ =\ 0}^{h}{\left\{\begin{matrix}\gamma_{dry}\\begin{matrix}\gamma_{wet}\\begin{matrix}\gamma_{zav}\\gamma_{sat}-\gamma_w\\end{matrix}\\end{matrix}\\end{matrix}ight\}\ h_i\ }$

Question 12

USUAL SOIL STRATA

Accepted Answer

$\frac{SAND\ ABOVE}{CLAY\ BELOW}$

Question 13

UNDERLAIN meaning

Accepted Answer

UNDERLAIN -past participle The meaning of UNDERLIE is to lie or be situated under UNDERLAIN WITH- napapailaliman UNDERLAIN BY - umi-ilalim

Question 14

TOTAL SOIL PRESSURE in EXCAVATION

Accepted Answer

$P_t\rightleftarrows\ P_{pw}$ compare TOTAL PRESSURE to PORE PRESSURE on SAME SOIL LEVEL or POINT

Question 15

UNDERLAIN meaning

Accepted Answer

UNDERLAIN -past participle The meaning of UNDERLIE is to lie or be situated under UNDERLAIN WITH- napapailaliman UNDERLAIN BY - umi-ilalim

Question 16

TOTAL SOIL PRESSURE in EXCAVATION

Accepted Answer

$P_t\rightleftarrows\ P_{pw}$ compare TOTAL PRESSURE to PORE PRESSURE on SAME SOIL LEVEL or POINT

Question 17

ASSUMPTION of SATURATION in CAPILLARY ZONE

Accepted Answer

100% SATURATED if NOT indicated the SATURATION in the CAPILLARY ZONE

Question 18

EFFECTIVE or INTERGRANULAR SOIL PRESSURE $P_t\ \ \&\ \ P_{pw}$

Accepted Answer

$P_{eff}\ =P_t\ \ -\ P_{pw}$

Question 19

CAPILLARY RISE

Accepted Answer

$h_c\ =\frac{c}{e\ D_{10}}$

Question 20

CAPILLARY RISE

Accepted Answer

$h_c\ =\frac{c}{e\ D_{10}}$

Question 21

Seepage Force per Unit Volume

Accepted Answer

$F\ =\ \frac{h}{H_2}\ \gamma_w\ $ $F\ =i\gamma_w$

Question 22

PORE WATER PRESSURE @ CAPILLARY ZONE

Accepted Answer

IT IS NEGATIVE $P_{pw}=\ -\gamma_w\left(h_i\right)\ \left(S\right)\ $

Question 23

PORE WATER PRESSURE @ CAPILLARY ZONE

Accepted Answer

IT IS NEGATIVE $P_{pw}=\ -\gamma_w\left(h_i\right)\ \left(S\right)\ $

Question 24

VOID RATIO in DENSEST CONDITION

Accepted Answer

$e_{min}\ =\ \ smallest\ void\ ratio$

Question 25

VOID RATIO in LOOSEST CONDITION

Accepted Answer

$e_{max}\ =\ \ largest\ void\ ratio$

Question 26

EMBANKMENT involving VOID RATIO and VOLUME

Accepted Answer

IDENTIFY the NEED and the AVAILABLE
___________________________
$V_{s\ (needed)}=\ V_{s\ (available)}$
$M_{s\ (needed)}=\ M_{s\ (available)}$
___________________________
$\dfrac{V_1}{1+e_1}=\dfrac{V_2}{1+e_2}$
___________________________
$\gamma_{d_1} \bullet V_1=\gamma_{d_2} \bullet V_2$

Question 27

SIEVE ANALYSIS only PERFORMS on GRAVEL and SAND

Accepted Answer

COARSE AGGREGATES SIEVE ANALYSIS only PERFORMS GRAVEL and SAND

Question 28

HYDROMETER TEST only PERFORMS on SILT and CLAY

Accepted Answer

FINE AGGREGATES HYDROMETER TEST only PERFORMS SILT and CLAY

Question 29

HYDROMETER TEST Length of Suspension

Accepted Answer

$L=\ 16.29\ -0.164R$

Question 30

HYDROMETER TEST Diameter of Soil Particles in Suspension

Accepted Answer

$D_{(mm)}=\ \sqrt{\frac{30\ \mu}{\rho_{soil\ }-\rho_{w\ }\ }}\bullet\ \sqrt{\frac{L_{(cm)}}{t_{(mins)}}}$

Question 31

HYDROMETER TEST Weight of Soil Particles in Suspension

Accepted Answer

$W\ =\ \frac{CHR}{50}\bullet\ W_s$

Question 32

HYDROMETER TEST Weight of Soil Particles in Suspension

Accepted Answer

$W\ =\ \frac{CHR}{50}\bullet\ W_s$

Question 33

SAND CONE TEST = FIELD DENSITY TEST (FDT)

Accepted Answer

SAND CONE TEST = FIELD DENSITY TEST (FDT)

Question 34

LIQUID LIMIT

Accepted Answer

OBTAIN USING INTERPOLATION (MODE 3-4) via CASAGRANDE (moisture content @ 25 Blows) and FALL-CONE TEST (moisture content @20mm penetration test)

Question 35

PLASTIC LIMIT

Accepted Answer

$PL=\ \frac{m_{wet}-m_{dry}\ }{m_{dry}}\ =\ \frac{m_{H_2O}}{m_{dry}}$ OR can be average of the MOISTURE CONTENT

Question 36

TOTAL AXIAL STRESS @ FAILURE is equal to MAXIMUM NORMAL STRESS @ MOHR's CIRCLE

Accepted Answer

TOTAL AXIAL STRESS @ FAILURE is equal to MAXIMUM NORMAL STRESS @ MOHR's CIRCLE

Question 37

NSCP SECTION 304 the presumptive load bearing capacity of gravelly, in the absence of exhaustive geotechnical site assessment and investigation

Accepted Answer

$\begin{matrix} Depth\ Factor (D)\ Width\ Factor(W)\\end{matrix}$ $$ $1+\dfrac{0.2\left[\left(D\ or\ Wight)-300ight]}{300} \leq 1.60

GEOTECH part 2

All cards